20981104

素因数分解:

$2^4\times {\mathrm{389}}^1\times {\mathrm{3371}}^1$

素因数の和:3768

約数の個数: 20

約数和(自身を含む): 40767480

約数和(自身を除く): 19786376

約数列:

[1, 2, 4, 8, 16, 389, 778, 1556, 3112, 3371, 6224, 6742, 13484, 26968, 53936, 1311319, 2622638, 5245276, 10490552, 20981104]

約数ペア:

[(1, 20981104), (2, 10490552), (4, 5245276), (8, 2622638), (16, 1311319), (389, 53936), (778, 26968), (1556, 13484), (3112, 6742), (3371, 6224)]